Get output from Sound Cue

Hi everyone.

I need to create a subtitle system. I wanted to use the Subtitle parameter of the sound waves, but I can’t get the sound wave dynamicaly in my BP because I spawn Sound Cue.
Also, We put several waves in an unique sound cue, Like when the player get shot by enemies. I wanted to get the output of the sound cue (So, the played sound wave), then get the correct subtitle depending of the localization choosed by the player.

Am I forced to use dialogue files ? It will force us to change all the system made by our sound designers =. Do you have any advice ?
Thanks !